"Incorrect namespace" error!

Hi to all,
From long time I am searching on google how to fix the “Incorrect namespace” error but for now I didn’t find any answer (for my situation) and then I decided to ask here

I am using Minerva SEO (IPBSEO) on my IPB forum; google says that the problem is on line 11 in

http://numizmatici.com/sitemapx.xml?in=1

Code (markup):

I searched a lot but for me everything seems O.K

Can someone help me with that?

Thank you all in advance!

 

why not you use this site for site map generation
www xml-sitemaps com

for sitmap generation?


Free link exchange

 

Yeah but have in mind that we are talking for a forum, it will be very difficult to generate sitemap all the time when new threat is posted…

 

I think it have It have same priority problem
because every url have same 0.5....

Isn't so....

 

can you send the full error message?

So that I understand the whole thing....

 

Okay here is the screenshot:



BTW, thank you very much!